1 files changed, 91 insertions, 0 deletions
diff --git a/xlators/features/bit-rot/src/bitd/bit-rot-ssm.c b/xlators/features/bit-rot/src/bitd/bit-rot-ssm.c
new file mode 100644
index 00000000000..c95e5551c0d
--- /dev/null
+++ b/xlators/features/bit-rot/src/bitd/bit-rot-ssm.c
@@ -0,0 +1,91 @@
+/*
+   Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
+*/
+
+#include "bit-rot-ssm.h"
+#include "bit-rot-scrub.h"
+
+int br_scrub_ssm_noop (xlator_t *this, br_child_t *child)
+{
+        return 0;
+}
+
+int
+br_scrub_ssm_state_pause (xlator_t *this, br_child_t *child)
+{
+        gf_log (this->name, GF_LOG_INFO,
+                "Scrubber paused [Brick: %s]", child->brick_path);
+        _br_child_set_scrub_state (child, BR_SCRUB_STATE_PAUSED);
+        return 0;
+}
+
+int
+br_scrub_ssm_state_ipause (xlator_t *this, br_child_t *child)
+{
+        gf_log (this->name, GF_LOG_INFO,
+                "Scrubber paused [Brick: %s]", child->brick_path);
+        _br_child_set_scrub_state (child, BR_SCRUB_STATE_IPAUSED);
+        return 0;
+}
+
+int
+br_scrub_ssm_state_active (xlator_t *this, br_child_t *child)
+{
+        struct br_scanfs *fsscan = &child->fsscan;
+
+        if (fsscan->over) {
+                (void) br_fsscan_activate (this, child);
+        } else {
+                gf_log (this->name, GF_LOG_INFO,
+                        "Scrubbing resumed [Brick %s]", child->brick_path);
+                _br_child_set_scrub_state (child, BR_SCRUB_STATE_ACTIVE);
+        }
+
+        return 0;
+}
+
+int
+br_scrub_ssm_state_stall (xlator_t *this, br_child_t *child)
+{
+        gf_log (this->name, GF_LOG_INFO, "Brick [%s] is under active "
+                "scrubbing. Pausing scrub..", child->brick_path);
+        _br_child_set_scrub_state (child, BR_SCRUB_STATE_STALLED);
+        return 0;
+}
+
+static br_scrub_ssm_call *
+br_scrub_ssm[BR_SCRUB_MAXSTATES][BR_SCRUB_MAXEVENTS] = {
+        {br_fsscan_schedule, br_scrub_ssm_state_ipause},    /* INACTIVE */
+        {br_fsscan_reschedule, br_fsscan_deactivate},       /* PENDING  */
+        {br_scrub_ssm_noop, br_scrub_ssm_state_stall},      /* ACTIVE   */
+        {br_fsscan_activate, br_scrub_ssm_noop},            /* PAUSED   */
+        {br_fsscan_schedule, br_scrub_ssm_noop},            /* IPAUSED  */
+        {br_scrub_ssm_state_active, br_scrub_ssm_noop},     /* STALLED  */
+};
+
+int32_t
+br_scrub_state_machine (xlator_t *this, br_child_t *child)
+{
+        br_private_t       *priv      = NULL;
+        br_scrub_ssm_call  *call      = NULL;
+        struct br_scanfs   *fsscan    = NULL;
+        struct br_scrubber *fsscrub   = NULL;
+        br_scrub_state_t    currstate = 0;
+        br_scrub_event_t    event     = 0;
+
+        priv = this->private;
+        fsscan = &child->fsscan;
+        fsscrub = &priv->fsscrub;
+
+        currstate = fsscan->state;
+        event = _br_child_get_scrub_event (fsscrub);
+
+        call = br_scrub_ssm[currstate][event];
+        return call (this, child);
+}